Magnesium, Urine with Creatinine

Test code

6179

CPT code(s)*

82570, 83735

**CPT Code is subject to a Medicare Limited Coverage Policy and may require a signed ABN when ordering.

Not offered in Quest Diagnostics Nichols Institute (IFD) – San Juan Capistrano. Please provide Service area information to confirm Test Code for the lab that services your account or to find available tests you can order.

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Clinical significance

Magnesium, Urine with Creatinine - This test may be used to investigate causes of abnormal serum magnesium levels. It may also be used to assess risk for renal stone formation and to evaluate for magnesium deficiency or excess. Measurement of total serum magnesium is generally considered sufficient for most clinical scenarios. However, measurement of magnesium in urine can provide additional useful information in some settings [1]. Magnesium is a trace element primarily acquired through dietary intake. Magnesium is stored within bones and intracellularly, where it binds to adenosine triphosphate (ATP) and serves as a cofactor for many cellular processes.…

Test resources

None found for this test
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Details

Test details

Methodology

Inductively Coupled Plasma/Mass Spectrometry (ICP/MS)

Specimen requirements
Patient preparation	None Specified
Preferred specimen(s)	Select a service area to view this section.
Alternative specimen(s)	Select a service area to view this section.
Minimum volume	0.5 mL
Collection instructions	Submit 10 mL of a well-mixed random collection. Adjust pH to <3.0 with 6N HCL prior to aliquoting for testing.
Transport container	Sterile screw-cap container
Transport temperature	Room temperature
Specimen stability	Room temperature: 4 days Refrigerated: 7 days Frozen: 90 days

Reference range(s)

Reference Range(s)

Magnesium, Random Urine

Adult

22-130 mg/g creat

Creatinine, Random Urine

≤6 Months	2-28 mg/dL
7-11 Months	2-31 mg/dL
1-2 Years	2-110 mg/dL
3-8 Years	2-130 mg/dL
9-12 Years	2-160 mg/dL
>12 Years Male	20-320 mg/dL
>12 Years Female	20-275 mg/dL

LOINC® codes

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Service Area Information

Performing lab & setup schedule

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Service Area Information

Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.

*The CPT codes provided are based on AMA guidance and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.

This material contains content from LOINC® (http://loinc.org). The LOINC Table, LOINC Table Core are copyright © 1995-2019, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee and is available at no cost under the license at http://loinc.org/license.

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